oqch12 pqch qqch1 rqch12 sqch
dhdh ehdh1 fhdh12 ghdh hhdh1
27dh1 37dh12 47dh 57dh1 67dh12
ryeh12 syeh tyeh1 uyeh12 vyeh
gpfh hpfh1 ipfh12 jpfh kpfh1